payne



A. E. PAYNE.

MAGNETO IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JAN 5. I9I6.

1 194313. PIIIIIIIIII Aug. 8, IIIIII 2 SHEETS-SHEET I.

\ 4 5 I, 12 '1 X5 WITNESSES INVENTQRM z-WZ n6 A. F. PAYNE.

MAGNETO IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES. APPLICATION FILED IAN-5.19m. v 1,194,313. I Patented'Aug. s, 1916.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR c/Yhaarzpa ze 7 2mg I The cam rises abruptly at the end which the fiber block first engages. so that the contacts are quickly opened. the quickness of the break being enhanced by the fact of the knife-edge 4: being situated near the one end of the rocker, but the cam is so sloped and shaped that the contacts are closed slowly thus minimizing hammering of the points. i The closing is effected by the spring (3, assisted by the natural el'l'ect of the centrifugal force when thearmaturois revolving.

For the timing of the ignition the cam ring 9 is rotatably mounted within a recess in the face 01 the bearing plate 23, and is provided with two or more radial keys 21 which extend preferably through gaps in the recessed part of the bearing plate "23 and detachably engage with grooves or key waysifi in the contact-breaker casing or cover '27 which is rotatably mounted upon the bearing plate 22) and is adapted to be rocked more or less by means of the timing levers 28, thus turning the cam ring 9 to retard or advance the spark as desired. The casing or cover 2? may be removed from the machine without disturbing the cam ring 9, so that the working of the r rriagn'eto can be properly inspected and any desired adjustments readily made. The casing 27 is normally maintained in place by a spring arm 29 hearing on the end plate 30.

Preferably one or more sight-holes are provided in the cover 27, being'so situated that the sparking at the contact points can be observed without removing the cover.

If desired the rocker arm 1 may have a fulcrum of the kind shown at 4 Fig. 6, same consisting of av parallel-sided transverse rib engaging in a groove in the carrier plate. The contact point 11 may be mounted upon the end of a screw adjustably carried by the end of the rocker and fitted with a lock nut.

Fig. 7 shows an alternative form of brush for insuring the etlicient earth return of the low-tension current, said spring-loaded brush 2 being housed in a recess 31 in the cam ring 9 and being forced radially inward by means of a spring 32 so as to bear upon the armature shaft. The cam ring may carry two cams 10 as shown in Fig. 7, and its angular movement may be limited by pins engaging in slots 38 in the middle part of the ring. Or, as in Fig. 7", to obtain an eflicient earth return a spring-loaded carbon brush 22 may be located in a recess in the bearing plate 23 so as to bear on the armature shaft 19.

in order to lock the contact adyustment screw 18 against inadvertent rotation, the

device illustrated inFigs. 8 and i) may be adopted. Situated over the spring arm 13 is a second spring 31- havin a' hexagonal hole 35 engaging with the head of the screw 18. lVhen a spanner is applied to the latter the spring 31 is depressed out of engagement with the hexagonal part of the. head opposite to a plain circular part 40. so that the screw can be rotated, but said spring again moves into engagement with the hexagonal part of the head on the latter being brought into register with the head and the spanner being removed.

In the alternative form of the locking device illustrated in Figs. 10 and 1 1, the head of the screw is made square upon its 'underside at 36 and the spring arm 13 carrying the contact'1i2 has a square hole 37 which springs into' engagement with the squared part 86 but which can be disengaged by depressing the spring to allow of adjustment of the screw.

Instead of the stationary 12 being carried by a spring, as in theabovo described arrangements, it may, as shown in Fig. 1'2, be carried by a rigid arm 11 suitably attached to the insulator 15.

Fig. 13 represents a modified form of spring for retaining the rocker arm in position, said-spring 6 being pivoted at one. end at 7; and having its opposite end forked at 38 to engage a :rew 39 carried by the plate To detach the rocker arm the screw 39 is slackened and the spring swung clear.

Instead of the rocker arm being mounted upon a knife-edge it may be provided with any equivalent or suitable form of fulcrum engaging within a recess or open bearing and maintained therein by a spring or the like, so that thcrocker can be lifted away from the carrier plate in the plane in which the said rocker moves. Thus, in Fig. let

the rocker lever 1 is provided with lateral pivots or trunmons 1, 4, maintained in engagement with n opemtopped bearings 5, 5, by means ot the spring 6, whlch can be turned aside to admit of the removal of the rocker.

The rocker arm may, if desired, be arranged to turn in a plane at right angles to the axis of the armature, as shown in Fig. 15, where the rocker 1 is removabl y mounted upon a knife-edge 4and is retained in position by a spring 6.

Having fully described my invention, what I desire to claim and secure Patent is 1. In a magneto-electric ignition apparatus; a detachable contact-breaker rocker arm which is mounted upon a fulcrum, which is maintained in removable engage ment with an open bearing by means of a spring.

In a imxgneto-electrioignition apparatus; a detachable contact-breaker rocker arm which is mounted n )on a flllCl'lUl'l'WlllCh is maintained in. removable engagement with an open bearing recess by means of a spring which tendsto close the contact points.

contact: point by Letters 3. In a magneto-electric ignition apparatus; a detachable contact breaker rocker arm mounted upon a fulcrum which is sit-' uated nearer that end of the arm which is acted uponby the cam, said fulcrum being maintained in positionby means of a spring.

4. In a magneto-electric ignition apparatus; the combination with the contact breaker carrier plate, of a detachable rocker arm mountedthereon'by means of a knifecdge fulcrum engaging an open groove, a contact point on the rocker arm, a cam, a striker block carried by the rocker for engagement by the cam, an insulating block fixed to the carrier plate, an arm mounted thereon in electrical connection with the primary winding of the armature, and a contact point, said arm cooperating with the contact point on the rocker arm.-

In a magneto-electric ignition apparatus; the combination with the contactbreaker carrier plate, of a detachable rocker arm mounted thereon, a contact point on the rocker arm, a cam, a striker block carried by the rocker for engagement by the cam, an insulating block fixed on the carrier plate, a spring arm mounted thereon in elec: trical connection with the of the armature, a contact. point on said spring arm, an adjusting screw acting on said arm, and a spring locking device engaging with the head of the screw. 7 .2

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ALEXANDER FLEXMAN PAYNE.

Witnesses; v i

WILLIAM STAITES SKERRETT, RIoHAno Grr'rmes,

primary winding. 

